## Calculate OEE over multiple shifts

Q: My boss wants me to calculate and present a graphical OEE representation per week or month. So we need to calculate an average OEE over multiple shifts. I present this as I do with the daily data. I calculate the monthly OEE by taking the average of the daily OEE’s.

Is it alright to present a monthly OEE of the machines by calculating the average of several daily OEE’s in a month?

## Calculate a monthly OEE

Q: My boss wants me to calculate and present a graphical OEE representation on a monthly basis. I present this as I do with the daily data. I calculate the monthly OEE  by taking the average of the daily OEE’s.

Is it alright to present a monthly OEE of the machines by calculating the average of the daily OEE’s in a month?

## Availability (or OEE) of a not yet completed shift

Q: What is the availability (or OEE) of a shift when the shift is not completed yet?

## How to calculate OEE with mixed output?

Q: Our machine can run mixed output, so several different products, each shift. Till now we just recorded the time the machine was running and the output we had. Our software now requires that we register activities and quantities to account for every minute in a shift. But we are not tracking the number of minutes it ran each product.

## Software and Implementation Questions

I am an industrial engineering supervisor. I work for an automotive sensors, solenoids, and switches supplier for the automotive market. We are 53rd out of the 150 top suppliers.

I have some questions for you regarding OEE implementation and software:

## OEE and low Planning/Schedule adherence

Q:  It is theoretically possible to have high OEE and very low schedule adherence, as OEE has no component to measure ‘are we making the correct product today?’.

## Choosing OEE Software

Q: I have to compare different OEE Softwares. There is a wide range of suppliers. The software should be very simple. The data collection should be manual, maybe with a bar-code scanner. A significant data evaluation is important. Could you recommend some suppliers?